US3818277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Start device for battery igniter
Assignee: Braun GmbH
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Filing: 1973-08-17
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Granted: 1974-06-18
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Expires: 1993-08-17
Abstract
Abstract An electronic starting circuit including a battery for igniting a lighter. The circuit includes a spark discharge gap for igniting the gas of the lighter. The circuit itself includes an oscillating transformer having a feedback branch and a transistor voltage converter followed by a rectifier to which is coupled a storage capacitor which in turn feeds the spark gap through an ignition transformer.
Inventors
- 👤 E Gersing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:36
CPC Classifications
F; F23; F23Q; F23Q3/00; F23Q3/004; H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/338; H02M3/3385
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
173 words
Start device for a battery igniter of the type having an oscillating transformer with a feedback branch and including a transistor voltage converter fed by a battery and a following rectifier to which is connected a charge storage capacitor which in turn feeds a spark gap defined by two electrodes by means of an ignition transformer, the feedback branch including a base voltage divider for the oscillating transformer of the voltage converter, the improvement comprising: a series connection of at least a resistor and a transistor forming the base voltage divider, a multiple way switch having a cut-out contact, the control electrode of said transistor being connected to said cut-out contact, the closing contact of said multiple way switch being connected with that pole of said battery having a polarity to cause an increase of the conductivity of said base voltage transistor, the switch contact of said switch being connected with one of the conductors of said voltage converter and a capacitor connected in parallel to said cut-out contact and said closing contact.
Claim 2
Dependent Claim
173 words
Start device for a battery igniter of the type having an oscillating transformer with a feedback branch and including a transistor voltage converter fed by a battery and a following rectifier to which is connected a charge storage capacitor which in turn feeds a spark gap defined by two electrodes by means of an ignition transformer, the feedback branch including a base voltage divider for the oscillating transformer of the voltage converter, the improvement comprising: a series connection of at least a resistor and a transistor forming the base voltage divider, a multiple way switch having a cut-out contact, the control electrode of said transistor being connected to said cut-out contact, the closing contact of said multiple way switch being connected with that pole of said battery having a polarity to cause an increase of the conductivity of said base voltage transistor, the switch contact of said switch being connected with one of the conductors of said voltage converter and a capacitor connected in parallel to said cut-out contact and said closing contact.
Claim 3
Dependent Claim
57 words
Start device as defined in claim 1 wherein said base voltage divider includes two resistors between which is connected the emitter-collector path of said base voltage transistor and wherein the free ends of said resistors are connected to the conductors of said voltage converter and wherein the base of said base voltage transistor forms the control electrode.
Claim 4
Dependent Claim
51 words
Start device as defined in claim 2 wherein the feedback branch of said oscillating transformer in series with the base-emitter path of said oscillating transistor is connected in parallel to that one of said resistors of said base voltage divider which is connected to the conductor connected to said switching contact.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |